World War II: A global conflict fought between 1939 and 1945 involving many countries around the world.
Cold War: A state of political tension between democratic Western powers (led by the United States) and communist Eastern powers (led by the Soviet Union) from roughly 1947 to 1991.
Baby Boom: A significant increase in birth rates after World War II, resulting in a large generation of people born between the mid-1940s and mid-1960s.